Number of permutations of length n without modular 3-sequences.

A165960

Number of permutations of length n without modular 3-sequences.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =3a(4) =20a(5) =100a(6) =612a(7) =4389a(8) =35688a(9) =325395a(10) =3288490a(11) =36489992a(12) =441093864a(13) =5770007009a(14) =81213878830

External references